Montana activists stop the largest coal mine plant in the United States, 2010-2016
The Powder River Basin, a 20,000 square mile region stretching across Eastern Montana and Wyoming, was long the coal mining hub of North America. In 2022, the region produced over 250 million tons of coal, almost half of the total coal production in the United States that year. The five largest coal mines in the country are in the basin, and in 2009, Arch Coal introduced plans to build the largest coal mine in North America.